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Diodes Incorporated PI7C9X2G608GPBEVB-X4U
- Part No.:
- PI7C9X2G608GPBEVB-X4U
- Manufacturer:
- Diodes Incorporated
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- Datasheet:
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PI7C9X2G608GPBEVB-X4U.pdf
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Product details
Overview
PI7C9X2G608GPBEVB-X4U from Diodes Incorporated is a PCI Express Gen 2 packet switch with 6 ports and 8 total lanes, supporting transparent bridging, hot-plug, AER, and ACS. It operates at 2.5 GT/s per lane, features integrated 8K-byte SRAM buffer, and supports PCIe 2.0 compliance with L0s/L1 power states. Used in embedded computing backplanes requiring multi-device PCIe fanout.
For engineers reviewing the PI7C9X2G608GPBEVB-X4U datasheet, PI7C9X2G608GPBEVB-X4U pinout, PI7C9X2G608GPBEVB-X4U application, or PI7C9X2G608GPBEVB-X4U equivalent, key selection criteria include port-lane configuration flexibility (x1/x2/x4), EEPROM-based initialization, SMBus/I²C system management, and support for PCIe 2.0 root complex and endpoint topologies.
Technical Context
This switch implements full PCIe 2.0 transaction layer logic including TLP decapsulation/encapsulation, routing, VC arbitration, flow control, and TC/VC mapping. It supports both transparent and non-transparent bridge modes via configuration registers and provides per-port link training with receiver equalization and transmitter de-emphasis tuning.
The device integrates a 196-ball LBGA package with dedicated power domains for I/O (1.5V), core (1.05V), and analog PLL (2.5V), and uses an external 100 MHz differential reference clock. Configuration is managed via on-chip EEPROM, SMBus, or I²C slave interface - enabling runtime reconfiguration without host intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| PCIe Generation | Gen 2 (2.5 GT/s per lane); ensures backward compatibility with PCIe 1.1 and interoperability with legacy root complexes. |
| Total Lanes | 8 lanes; configurable across 6 ports (e.g., x4+x1+x1+x1+x1+0 or x2+x2+x1+x1+0+0) to match system topology requirements. |
| Buffer Memory | 8 Kbytes SRAM; enables store-and-forward switching with low-latency packet buffering for congestion management. |
| Power States | L0s/L1 supported; reduces dynamic power during idle periods while maintaining link synchronization for fast wake-up. |
| Reference Clock | 100 MHz differential input; eliminates need for internal oscillator and simplifies board-level clock distribution. |
| Configuration Interface | SMBus/I²C + EEPROM; allows autonomous boot-time setup and field-updatable register programming without host CPU involvement. |
| Operating Temperature | 0°C to +70°C ambient; validated for commercial-grade industrial embedded systems with passive cooling. |
Pinout & Package
Package: 196-pin Low-Profile Ball Grid Array (LBGA), 12 mm × 12 mm, 0.8 mm pitch, RoHS-compliant and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLK_P / CLK_N | Differential Reference Clock Input | Accepts 100 MHz LVDS-compatible clock; drives internal PLL for all PCIe PHYs and timing blocks. |
| PERST# | Global Reset Input | Active-low asynchronous reset that clears configuration registers and forces re-initialization from EEPROM. |
| SCL / SDA | SMBus/I²C Slave Interface | Enables host-side register read/write access and firmware updates without PCIe enumeration dependency. |
| EEPROM_CLK / EEPROM_DATA | Serial EEPROM Interface | Loads initial configuration (port mapping, vendor ID, subsystem ID) at power-on before PCIe link training begins. |
| PRSNT#_A–F | Hot-Plug Presence Detection | Per-port presence detect inputs allow dynamic slot insertion/removal detection and safe link retraining. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable Port-Lane Mapping | Supports 12 predefined configurations (e.g., x4+x2+x2, x2+x2+x1+x1+x1+x1) via EEPROM or register write - eliminates hardware redesign for topology changes. |
| Transparent Bridge Mode | Operates as standard PCIe switch without address translation; preserves native PCIe enumeration and driver compatibility across endpoints. |
| Advanced Error Reporting (AER) | Provides detailed error logging (correctable/uncorrectable/fatal) per port with interrupt generation - accelerates system-level debug and reliability monitoring. |
| ACS (Access Control Services) | Enables peer-to-peer isolation and DMA protection between downstream devices - required for virtualized and secure multi-tenant environments. |
| Hot-Plug Support | Full hardware-assisted hot-plug sequence (presence detect, power sequencing, link training) compliant with PCIe Base Spec 2.0 Section 6.6. |
Applications
| Industrial Control Backplane | Medical Imaging Subsystem |
|---|---|
|
Use Scenario: Multi-sensor data acquisition chassis with FPGA, GPU, and ADC modules connected via PCIe slots. IC Role / Device Role / Timing Role: PCIe Gen 2 packet switch providing deterministic low-latency interconnect between heterogeneous peripherals and host CPU. Use Value: Enables simultaneous high-throughput streaming from 4+ PCIe endpoints using only 8 lanes, reducing slot count and PCB layer complexity. |
Use Scenario: CT/MRI scanner subsystem integrating real-time image reconstruction engine, detector interface, and storage controller. IC Role / Device Role / Timing Role: Transparent PCIe switch managing traffic between GPU-accelerated processing unit and high-speed NVMe storage. Use Value: Maintains PCIe 2.0 timing integrity across variable-length traces and supports AER for diagnostic logging during FDA-certified operation. |
| Test & Measurement Rack | Avionics Data Concentrator |
|
Use Scenario: Modular PXIe chassis hosting mixed-signal digitizers, RF signal generators, and digital pattern instruments. IC Role / Device Role / Timing Role: Fanout switch distributing PCIe root complex bandwidth across six instrument slots with independent lane allocation. Use Value: Eliminates need for multiple root ports or PCIe switches in cascade, lowering jitter accumulation and power consumption per instrument slot. |
Use Scenario: DO-254-compliant flight data recorder aggregating ARINC 429, MIL-STD-1553, and discrete I/O via PCIe-connected interface cards. IC Role / Device Role / Timing Role: Ruggedized PCIe switch operating in extended temperature range with deterministic latency for time-critical avionics bus bridging. Use Value: Provides hot-plug capability for field-replaceable LRUs and ACS-enforced isolation between safety-critical and non-critical partitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PCIe Gen 2 switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ASM1083 | Single upstream/downstream port (2-lane), no EEPROM, requires host BIOS configuration; lacks AER and ACS. | Targeted at basic PCIe expansion (e.g., add-in card bridges), not multi-port fanout or hot-plug systems. | Select when cost sensitivity outweighs configurability and robustness requirements. |
| PI7C9X2G304 | 4-port/4-lane variant; same architecture but reduced lane count and smaller SRAM (4 KB); identical pinout footprint. | Suitable for space-constrained designs where full 8-lane capacity is unnecessary (e.g., dual-slot embedded controllers). | Choose for footprint compatibility and simplified thermal/power design where bandwidth demand is ≤4 lanes. |
Compared with ASM1083 and PI7C9X2G304, the PI7C9X2G608GPBEVB-X4U delivers higher lane density, autonomous EEPROM boot, and enterprise-grade reliability features (AER/ACS/hot-plug), making it optimal for scalable, maintainable PCIe infrastructure rather than point-to-point extension.
Availability
PI7C9X2G608GPBEVB-X4U is available at Aetrix Electronics and suitable for industrial control backplanes, medical imaging subsystems, and test & measurement racks requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for PI7C9X2G608GPBEVB-X4U includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global manufacturer of discrete semiconductors and integrated circuits, headquartered in California, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The PI7C9X2G608GP belongs to Diodes' PCI Express Switch family, engineered specifically for embedded systems requiring flexible, standards-compliant PCIe interconnect with minimal host software overhead and robust field serviceability.
FAQ
Does PI7C9X2G608GPBEVB-X4U support PCIe Gen 3?
No. The device is strictly PCIe Gen 2 compliant, operating at 2.5 GT/s with Gen 2 physical and data link layer logic. It does not implement Gen 3 equalization, 8b/10b encoding bypass, or 5.0 GT/s signaling. Attempting Gen 3 link training will fail at the electrical detection phase.
Can the port configuration be changed after power-up?
Yes. Port-lane mapping can be dynamically reconfigured via SMBus or I²C register writes to the OPERATION MODE register (offset 98h), provided the target configuration is one of the 12 pre-defined modes in the device's configuration space. EEPROM reload requires full reset.
What is the function of the PRSNT# pins?
Each PRSNT# pin (A–F) corresponds to a downstream port and signals mechanical presence of a PCIe card. When pulled low by a connected card, it triggers automatic link training and enables hot-plug event handling per PCIe Base Specification 2.0 Section 6.6.
Is an external EEPROM mandatory for operation?
No. While EEPROM is the default boot source for configuration, the device supports alternative initialization via SMBus or I²C register writes prior to link training. However, EEPROM is required for autonomous operation without host intervention during cold start.
PI7C9X2G608GPBEVB-X4U Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- GreenPacket™
- Packaging:
- Box
- Product Status:
- Active
- Type:
- Interface
- Function:
- PCIe Switch
- Embedded:
- -
- Utilized IC / Part:
- PI7C9X2G608GPB
- Primary Attributes:
- -
- Secondary Attributes:
- -
- Contents:
- Board(s)
PI7C9X2G608GPBEVB-X4U FAQ
1.How can I place an order for PI7C9X2G608GPBEVB-X4U through Aetrix?
Please submit a Request for Quotation (RFQ) for PI7C9X2G608GPBEVB-X4U on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for PI7C9X2G608GPBEVB-X4U reliable?
The price and inventory of PI7C9X2G608GPBEVB-X4U are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI7C9X2G608GPBEVB-X4U is usually 5 days.
3.What payment methods are accepted for PI7C9X2G608GPBEVB-X4U?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI7C9X2G608GPBEVB-X4U transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI7C9X2G608GPBEVB-X4U?
PI7C9X2G608GPBEVB-X4U orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI7C9X2G608GPBEVB-X4U order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for PI7C9X2G608GPBEVB-X4U?
For technical support, including PI7C9X2G608GPBEVB-X4U datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI7C9X2G608GPBEVB-X4U requirements.
6.How does Aetrix verify that PI7C9X2G608GPBEVB-X4U is sourced from the original manufacturer or authorized distributors?
All PI7C9X2G608GPBEVB-X4U products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that PI7C9X2G608GPBEVB-X4U meets industry standards.
7.What is the process for return or replacement of PI7C9X2G608GPBEVB-X4U?
All PI7C9X2G608GPBEVB-X4U units undergo pre-shipment inspection (PSI). If there is an issue with PI7C9X2G608GPBEVB-X4U, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The PI7C9X2G608GPBEVB-X4U part is unused and in its original packaging.
Return procedure for PI7C9X2G608GPBEVB-X4U:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PI7C9X2G608GPBEVB-X4U Tags
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